From 6d174f732e198aae8583cc5414b11b988bfd37a9 Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Mon, 30 Jan 2012 22:44:15 +0100
Subject: [PATCH 4/4] ssb: add support for bcm5354
This patch adds support the the BCM5354 SoC.
It has a PMU and a constant not configurable clock.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
drivers/ssb/driver_chipcommon_pmu.c | 48 +++++++++++++++++++++++++++++++---
drivers/ssb/driver_mipscore.c | 3 ++
drivers/ssb/main.c | 3 ++
drivers/ssb/ssb_private.h | 4 +++
4 files changed, 53 insertions(+), 5 deletions(-)
--- a/drivers/ssb/driver_chipcommon_pmu.c
+++ b/drivers/ssb/driver_chipcommon_pmu.c
@@ -13,6 +13,9 @@
#include <linux/ssb/ssb_driver_chipcommon.h>
#include <linux/delay.h>
#include <linux/export.h>
+#ifdef CONFIG_BCM47XX
+#include <asm/mach-bcm47xx/nvram.h>
+#endif
#include "ssb_private.h"
@@ -92,10 +95,6 @@ static void ssb_pmu0_pllinit_r0(struct s
u32 pmuctl, tmp, pllctl;
unsigned int i;
- if ((bus->chip_id == 0x5354) && !crystalfreq) {
- /* The 5354 crystal freq is 25MHz */
- crystalfreq = 25000;
- }
if (crystalfreq)
e = pmu0_plltab_find_entry(crystalfreq);
if (!e)
@@ -321,7 +320,11 @@ static void ssb_pmu_pll_init(struct ssb_
u32 crystalfreq = 0; /* in kHz. 0 = keep default freq. */
if (bus->bustype == SSB_BUSTYPE_SSB) {
- /* TODO: The user may override the crystal frequency. */
+#ifdef CONFIG_BCM47XX
+ char buf[20];
+ if (nvram_getenv("xtalfreq", buf, sizeof(buf)) >= 0)
+ crystalfreq = simple_strtoul(buf, NULL, 0);
+#endif
}
switch (bus->chip_id) {
@@ -330,7 +333,11 @@ static void ssb_pmu_pll_init(struct ssb_
ssb_pmu1_pllinit_r0(cc, crystalfreq);
break;
case 0x4328:
+ ssb_pmu0_pllinit_r0(cc, crystalfreq);
+ break;
case 0x5354:
+ if (crystalfreq == 0)
+ crystalfreq = 25000;
ssb_pmu0_pllinit_r0(cc, crystalfreq);
break;
case 0x4322:
@@ -607,3 +614,34 @@ void ssb_pmu_set_ldo_paref(struct ssb_ch
EXPORT_SYMBOL(ssb_pmu_set_ldo_voltage);
EXPORT_SYMBOL(ssb_pmu_set_ldo_paref);
+
+u32 ssb_pmu_get_cpu_clock(struct ssb_chipcommon *cc)
+{
+ struct ssb_bus *bus = cc->dev->bus;
+
+ switch (bus->chip_id) {
+ case 0x5354:
+ /* 5354 chip uses a non programmable PLL of frequency 240MHz */
+ return 240000000;
+ default:
+ ssb_printk(KERN_ERR PFX
+ "ERROR: PMU cpu clock unknown for device %04X\n",
+ bus->chip_id);
+ return 0;
+ }
+}
+
+u32 ssb_pmu_get_controlclock(struct ssb_chipcommon *cc)
+{
+ struct ssb_bus *bus = cc->dev->bus;
+
+ switch (bus->chip_id) {
+ case 0x5354:
+ return 120000000;
+ default:
+ ssb_printk(KERN_ERR PFX
+ "ERROR: PMU controlclock unknown for device %04X\n",
+ bus->chip_id);
+ return 0;
+ }
+}
--- a/drivers/ssb/driver_mipscore.c
+++ b/drivers/ssb/driver_mipscore.c
@@ -232,6 +232,9 @@ u32 ssb_cpu_clock(struct ssb_mipscore *m
struct ssb_bus *bus = mcore->dev->bus;
u32 pll_type, n, m, rate = 0;
+ if (bus->chipco.capabilities & SSB_CHIPCO_CAP_PMU)
+ return ssb_pmu_get_cpu_clock(&bus->chipco);
+
if (bus->extif.dev) {
ssb_extif_get_clockcontrol(&bus->extif, &pll_type, &n, &m);
} else if (bus->chipco.dev) {
--- a/drivers/ssb/main.c
+++ b/drivers/ssb/main.c
@@ -1094,6 +1094,9 @@ u32 ssb_clockspeed(struct ssb_bus *bus)
u32 plltype;
u32 clkctl_n, clkctl_m;
+ if (bus->chipco.capabilities & SSB_CHIPCO_CAP_PMU)
+ return ssb_pmu_get_controlclock(&bus->chipco);
+
if (ssb_extif_available(&bus->extif))
ssb_extif_get_clockcontrol(&bus->extif, &plltype,
&clkctl_n, &clkctl_m);
--- a/drivers/ssb/ssb_private.h
+++ b/drivers/ssb/ssb_private.h
@@ -211,4 +211,8 @@ static inline void b43_pci_ssb_bridge_ex
}
#endif /* CONFIG_SSB_B43_PCI_BRIDGE */
+/* driver_chipcommon_pmu.c */
+extern u32 ssb_pmu_get_cpu_clock(struct ssb_chipcommon *cc);
+extern u32 ssb_pmu_get_controlclock(struct ssb_chipcommon *cc);
+
#endif /* LINUX_SSB_PRIVATE_H_ */